Molding-box.



W. KURZE.

MOLDING BOX.

APPLICATION FILED APR. 4, 191l 1 Q94 4. 4 7 Patented Apr. 28, 1914.-

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MOLDING BOX. APPLICATION FILED ABBA, 1911.

Patented Apr. 28, 1914- 4; annms-snnm a.

W. KURZE.

MOLDING BOX.

APPLIOATION FILED APRA, .1911.

' Patented Apr. 28, 19 14.

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specification of Letters Patent.

hlGLDIhlG-BOX.

Patented Apr. 28, 1914;

Application filed April 4, 191K. Serial No. 618,913.

To all whom it may concern: n Be it known that I, 'Wlnnnmir KUILZE, a resident of \Vilhelmshiitte, Neustadt-on-the- Eiibenbergc a subject of the King of Prussia and whose post-office address is Wilhelnisln'itte, Neustadt on the Riibenberge, near Hanover, Kingdom of Prussia, German Empire, have invented new and useful Improvements in or Relating to Molding- Boxes, of which the tollowing is a specification.

This invention relates to a metal-molding box to be used more particularly in the manufacture of soft castings. he molds hitherto used for the same purpose, having the molding sand firmly rammed around the model employed increase the cost of the casting to be produced owing to the necessity of a model and in consequence of the worlc involved in producing the casting.

in order to replace the model which up to the present could not be dispensed with use is made according to the present invention or" a metal-molding box, the interior or cavity of which does not precisely correspond with the casting to be produced but is slightly larger than the latter.- In the interior oi the metal-molding box small ribs or ledges are provided which determine the precise shape and size of the casting to'be produced and between which a lining or coating substance is placed. This substance is smoothed preferably with the aid of a plane by sliding it across the ledges. These ledges which by preference are arranged at the upper and lower end of the molding box may if desired be movable so as to enable castings of different sizes to be produced in one and the same molding box. Arranged in the walls of the metal-molding box which preferably consists of several parts are appropriate passages, adapted to receive and to discharge the gases from :the lining or coating; substance through transverse passages. In order to still further facilitate the handling and assembling of the individual parts of the box its individual parts may also be composed of two or several preferably plate-shaped sections. By this arrangement the release of a casting after the casting operation is considerably simplified since only the inner plate-shaped sections of the individual box portions need be removed. In. a construction of this kind the cooling passages are arranged in the innor sections and receive and discharge thegases through transverse passages.

In the drawings three constructional forms of the invention are illustrated.

Figure 1 is a transverse section. of one form of the metal-molding box. Fig. 2 a longitudinal section of the same with the core shown inserted. Fig. 3 represents the second constructional form in which each box part is composed of two plate-shaped sections, and Fig. 4: shows a further "modification of a complete molding flask with the core in inserted position,

In the construction illustrated in Figs. 1 and 2 the molding box consists of four mantle portions a and its cavity does not precisely correspond to the casting to be produced, but is slightly larger than the latter. The individual parts of the molding box may be of any desired form. Arranged in their interior by preference at the upper and lower end are small projecting ledges or ribs m (Fig. 2) determining the precise shape of the casting to be produced. Between these ribs an appropriate coating or lining substance h is applied. This living has a thickness of about to mm, and is smoothed by means of a plane operated over the ribs. as. The ribs :1: may be movable in the interior of the molding box by any suitable means known in the art, for instance as shown in Fig. 2, where the ribs are held in slotsin adjusted position by means of set-screws y. By thus moving the ribs at right angles to the central axis of the molding box the thickness of the lining substance employed between the ribs and consequently the size of the casting to be producednnay be varied. The adjustment and displacement of the ribs in the metal molding box may be effected in any appropriate manner. Arranged in the individual parts of the molding box and extending in axial direction are passages f adapted to receive and to discharge the gases from the lining substance it, through transverse passages ,1 thereby serving for cooling the individual parts of the mantle (1. Of course the shape and size'of the passages f may be varied at will. By preferthe ribs consists. of sand and linseed oil, but it may be constituted by other material such as clay, loam or the like., The individual parts of the molding box may be assemonce the lining substance arranged between bled and held in position in any apprcp manner and in order to counteract their mutual displacement or deformation, reinforcing ribs 0 or the like may be arranged on their outer faces.

In the constructional form shown in Fig. 3, the metal-molding box consists likewise of four parts of which each is composed of two plate-shaped sections 0: 7J1. The con-- tacting surfaces of these sections are substantially parallel with the inner molding walls. The connection of the two plateshaped sections a b may be eii'ectod in any desired manner. In the example shovnthe section a is provided with a dovetailed groove adapted to engage with a correspondingly shaped projection on the section 6 lhe cooling passages f adapted to receive and to discharge the gases are arranged in the inner sections 6 In this case of course the shape and size of the cooling and transverse passages may also be varied at will. For. the purpose of releasing a finished casting or of smoothing or replenishing the coating substance it is thus only necessary to withdraw the inner sections 6 from the outer sections a and then to reassemble these sections. The core used in the 1netalmolding box as shown in Fig. 2 is coated in the usual manner with a layer of a lining substance and is supported and guided in the lower box portion m by means of an appropriate projection. tion it is'rammed with molding sand in the usual manner and provided with intakes molded in the sand as known in the art. These intake openings which are omitted in Fig. 2 as obvious expedients, may if desired lead to the vertical channels 2) (Fig. l) and within these channels the metal may be conducted to passage 6', leading to the interior of the mold.

The construction of the modification shown in Fig. 4: is substantially the same as that illustrated in Figs. 1 to 3. In this case, however, the lower box portion m is secured by means of screws or the like to a suitable base or foundation 0. The central box portion has a slightly larger diameter than the casting to be produced, and as in the niodification described with reference to .FlQS. 1 to 3 the shell or mantle a is provided with ribs 00' between Whi-h the lining is is applied to the mantle and smoothed by means of suitable tools. A metal core 11 provided like wise with suitable coating or lining it is shown inserted in the mold. The mantle portion a may consist oi sc\ 'cral sections if desired, which are suitahly conrected with each other in any manner :nown in toe art in case longer articles The lower end of core 1) is provid an extension 1" of small diameter whi i ited in the central 1O1i3l01'1 m of the base 722 Enterr sion I" is provided with a trans erse horing vmold.

The upper. box por-' osses? they protrude with their free ends into the ll hen the metal fills the mold the staples 72 thereby weld to the metal and form convenient eyes by which the casting may be lifted from the mold.

lVith the aid. of the metal molding box according to this invention all possible castings may be produced such as for instance rolling ingots, pipes or the like.

W hat I do claim as my invention, and desire to secure by Letters Patent of the United States, is:

1. In a metal moldingbox the combina-- tion of a plurality of box parts, being composed of several sections and adjustable ribs on the inner sections of the box parts, for determining the precise shape the casting.

in a metal molding boa combinelion of a plurality of oci: parts, each being composed of two plate-shaped sections, the contacting faces of which are substantially parallel with the inner walls of the molding box and adjustable ribs on the inner sections of the box arts, for determining the precise shape of tie castin v 3. In a metal molding box the combination of a plurality of box parts, each being composed of two plate-shaped sections, the contacting faces of which are substantially parallel with the inner walls of the molding box formed by one or" said sections, cooling passages and transverse passages in the inner sections of the box parts for receiving and discharging the gases and ribs on the inner sections, substantiall as described.

i. In a metal molding on the combination of a plurality of box parts, each being composed of several sections, transverse passages extending; through the inner and outer sections of the box parts for receiving and discharging the gases and ribs on the said inner sections. substantially as described.

lo a metal molding box the combination of plurality of box parts ribs on each oi said parts, longitudinal passages and transverse passages in parts, hos: portion and a lower be portion and metal core with projections adapted i gage with corresponding openings i: said upper and lower box portions, tially r escribcd.

v 6. in a metal molding box the combine- Preicrably number of shackles or staples p are fastened to the top a so that,

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siges and transverse passages in the inner sections of the box parts for receiving and discharging the gases, ribs on the said inner sections, an upper box portion and a lower box portion and a metal core with projeo tions adapted to engage with corresponding openings in the sai'diipper and lower box portions, substantially as described,

7. In a metal molding box the combination of a plurality of box wart-s, each of which being composed of two plate-shaped sections, the contacting faces of which are substantially parallel With the ,inner walls of the molding box formed by one of said sections, cooling passages and transverse passages in the inner sections of the box parts for receiving and discharging the gases snclsribs on the said inner sections, an up per box portion and slower box port on and a. metal core with pro ections adapted to enwith corresponding openings in the messes.

' RZE.

geriiona; substan- WILHELl Witnesses ERNEST C. C'seiinonrzm, M. L. THOMPSON. 

